Cesc Fabregas joined Arsenal in 2003. Here he is aged 18 in a team photo two years later in 2005.
Here's the midfielder celebrating his goal against Liverpool in October 2007.
His job as a midfielder at Arsenal is to set up goals as well as score them.
Cesc has also been a star for Spain, and helped them win Euro 2008.
He was named as captain of Arsenal in November 2008, when he was only 21.
The Spaniard is thought by a lot of people to be one of the best midfielders in the world.
He hasn't won any trophies at Arsenal for a while, so some people reckon this lap of honour on the last day of the season could have been his last appearance for the Gunners.